B5 or B-5 may refer to:

• B5 (band), a teenage R&B group signed onto bad boy recodrds.
• Babylon 5, a science fiction television series
• B5, a Mazda piston engine
• Vitamin B5, Pantothenic acid
• The Keystone B-5, a light bomber of the United States Army Air Corps
• HMS B5, a British B class submarine
• B5, an international standard paper size (176×250 mm), defined in ISO 216
• B5, a Japanese standard paper size (182×257 mm)
•  %B5 is the URL encoded version of the µ (mu) character.

For other uses, see B5. ... Babylon 5 is an epic American science fiction television series created, produced, and largely written by J. Michael Straczynski. ... The Mazda B engine family is a four cylinder SOHC and DOHC engine family ranging from 1. ... Pantothenic acid, also called vitamin B5, is an antioxidant water-soluble vitamin needed to break down carbohydrates, proteins, and fats. ... Up until 1930, Light bomber planes were given the designation LB-. At that time the LB- designation was dropped, and the LB-14 was renamed the B-5. ... This page is a candidate for speedy deletion. ... HMS B4 The B class was a class of eleven submarines of the Royal Navy, built by Vickers and launched in 1904–1906. ... Comparison of the most common paper sizes. ... Comparison of the most common paper sizes. ... Percent-encoding, also known as URL encoding, is a mechanism for encoding information in a Uniform Resource Identifier (URI) under certain circumstances. ...

Transportation and energy

• B5, the IATA airline designator for Amadeus Flugdienst
• B5 star, a subclass of B-class stars
• The B5 platform used for the Audi A4 1995-2001 models
• A blend of 5% of biodiesel with petrodiesel, also written as BD5.

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